Analytical Study of Annular-Ring Microstrip Antennas Shorted With Thin Wires

A new theoretical analysis method is presented for annular-ring microstrip antennas with a short-circuited wall implemented as an array of thin cylindrical wires. Assuming wire spacing to be small compared to wavelength, the averaged boundary conditions are employed. An explicit characteristic equat...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2014-06, Vol.62 (6), p.3348-3353
Main Authors: Glybovski, Stanislav B., Akimov, Valeri P., Popugaev, Alexander E.
Format: Article
Language:English
Subjects:
Boundary value problems
Equations
Mathematical model
Microstrip antennas
periodic structures
Resonant frequency
Vectors
wire grids
Wires
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Summary:A new theoretical analysis method is presented for annular-ring microstrip antennas with a short-circuited wall implemented as an array of thin cylindrical wires. Assuming wire spacing to be small compared to wavelength, the averaged boundary conditions are employed. An explicit characteristic equation, which determines resonant frequencies depending on wire spacing and radius is derived. A calculation technique for antenna input impedance is presented. Obtained results show good agreement between theoretical and experimental data. It is shown that the wire short-circuited wall can bring considerably different resonant properties compared to continuous metallic one.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2014.2309973